John Gills Exposition of the Bible Commentary - 2 Samuel 20:5
So Amasa went to assemble the men of Judah ,.... To gather, them together out of their several tribes, and bring them to Jerusalem: but he tarried longer than the set time which he had appointed him : than the three days; whether this was owing to the remissness of Amasa, or the unwillingness of the people to serve under him, who had been Absalom's general in the late rebellion, or not having time sufficient allowed him, is not certain. read more
Matthew Henry's Complete Commentary - 2 Samuel 20:4-13
We have here Amasa's fall just as he began to rise. He was nephew to David (2 Sam. 17:25), had been Absalom's general and commander-in-chief of his rebellious army, but, that being routed, he came over into David's interest, upon a promise that he should be general of his forces instead of Joab. Sheba's rebellion gives David an occasion to fulfil his promise sooner than he could wish, but Joab's envy and emulation rendered its fulfillment of ill consequence both to him and David. I. Amasa has... read more